Searched hist:d1ec8a2eabe969b333031e8fb36fe7fc61a5f0ac (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/drivers/tty/serial/ |
| H A D | stm32-usart.h | diff d1ec8a2eabe969b333031e8fb36fe7fc61a5f0ac Wed Oct 20 10:03:32 CDT 2021 Erwan Le Ray <erwan.leray@foss.st.com> serial: stm32: update throttle and unthrottle ops for dma mode
Disable DMA request line (if enabled) to switch in PIO mode in throttle
ops, so the RX data gets queues into the FIFO. The hardware flow control
is triggered when the RX FIFO is full.
Switch back to DMA mode (re-enable DMA request line) in unthrottle ops.
Hardware flow control is stopped when FIFO is not full anymore.
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20211020150332.10214-4-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
| H A D | stm32-usart.c | diff d1ec8a2eabe969b333031e8fb36fe7fc61a5f0ac Wed Oct 20 10:03:32 CDT 2021 Erwan Le Ray <erwan.leray@foss.st.com> serial: stm32: update throttle and unthrottle ops for dma mode
Disable DMA request line (if enabled) to switch in PIO mode in throttle
ops, so the RX data gets queues into the FIFO. The hardware flow control
is triggered when the RX FIFO is full.
Switch back to DMA mode (re-enable DMA request line) in unthrottle ops.
Hardware flow control is stopped when FIFO is not full anymore.
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20211020150332.10214-4-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|